125220165 has 64 divisors (see below), whose sum is σ = 251596800. Its totient is φ = 51853824.

The previous prime is 125220163. The next prime is 125220167. The reversal of 125220165 is 561022521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (125220163) and next prime (125220167).

It is not a de Polignac number, because 125220165 - 2¹ = 125220163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125220163) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44521 + ... + 47249.

It is an arithmetic number, because the mean of its divisors is an integer number (3931200).

Almost surely, 2^125220165 is an apocalyptic number.

125220165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125220165 is an abundant number, since it is smaller than the sum of its proper divisors (126376635).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125220165 is a wasteful number, since it uses less digits than its factorization.

125220165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 125220165 is about 11190.1816339146. The cubic root of 125220165 is about 500.2933811547.

Adding to 125220165 its reverse (561022521), we get a palindrome (686242686).

The spelling of 125220165 in words is "one hundred twenty-five million, two hundred twenty thousand, one hundred sixty-five".